It shoots below the tail in the game.
Both of us can only conjecture unless you have a german armerors manual that describes the expected maximum arch of view with diagrams for setting the visierlinie of the reflexvisier gunsight. I would not be surprised if HTC owns that manual.
Unless you have this, your assertion is you know better via your analysis of photgraphs than HTC and are calling them out publicly on that. The only sure thing that is obvious from direct compairison is the shape and some of the structure of the canopy frame being off.
Locate a copy of the Me210\Me410 or Me410 A-1 Schußwaffenanlage booklet. I don't think you have a copy or you would have posted a visierlinie adjustment diagram in your original post and Waffel or someone would have responded early on.
As of now we are arguing feelings about how a function in a game operates.
The Revi25 is a compact version of the Revi16 designed for gun positions and was used in the 410 rear position. Since I was able to find a free download for a 410 A-1 general manual with this picture. I also found sources for pay of 210\410 manuals. I will assume HTC purchased a few of those manuals.
As of now your argument is with I assume, Hitech or Pyro on how they chose to impliment what they read and saw in those manuals. So it would be if you had those manuals an argument over preception. If you had the manuals they have.